The PDF format become more and more popular. We read and send a lot of PDF documents daily. So, we need some applications that can add security protection to them so that we can protect them from unauthorized edit. We add watermark and encrypt them using security options. One of the application which can perform these actions is Adobe Acrobat professional. But, it cost arround USD$500, which is very expansive for personal use.

PDFill PDF Tools also support MS-DOS batch operations which execute command directly from the MS-DOS command prompt without opening the GUI, but it is only available for registered users. PDFill PDF Tools required GhostScript before use. You can download and install GhostScript from PDFill.com. For more information, please refer PDFill Free Tools website.